Demise of one volcanic zone and birth of another; a 12 m.y. marine record of major rhyolitic eruptions from New Zealand

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doi: 10.1130/0091-7613(2003)031<0493:DOOVZA>2.0.CO;2
Author(s): Carter, Lionel; Shane, Philip; Alloway, Brent; Hall, Ian R.; Harris, Sara E.; Westgate, John A.
Author Affiliation(s): Primary:
National Institute of Water and Atmospheric Research, Wellington, New Zealand
University of Auckland, New Zealand
Geological and Nuclear Sciences, New Zealand
Cardiff University, United Kingdom
Sea Education Association, United States
University of Toronto, Canada
Volume Title: Geology (Boulder)
Source: Geology (Boulder), 31(6), p.493-496. Publisher: Geological Society of America (GSA), Boulder, CO, United States. ISSN: 0091-7613 CODEN: GLGYBA
Note: In English. 20 refs.; illus., incl. 1 table, sketch map
Summary: Ocean Drilling Program Sites 1123 and 1124 provide an unprecedented 12 m.y. record of major rhyolitic eruptions from the Coromandel and Taupo volcanic zones of New Zealand. Macroscopic tephras (n = 197) were dated using magnetostratigraphy, supplemented by geochemical correlation with subaerial tephra, isothermal plateau fission-track ages, and orbitally tuned stable isotope data. Eruptions began in the Coromandel volcanic zone ca. 12 Ma, ∼1.6-1 m.y. earlier than previously known. Thereafter, volcanism was fairly continuous with a tempo and intensity that increased through the late Miocene-Pliocene and into the Quaternary, when the Taupo volcanic zone formed. The transition from the Coromandel to the Taupo zone, previously placed as ca. 4-2 Ma, was seamless, without obvious breaks or changes in ash composition. This well-dated history of long-lived and productive volcanism allows for more confident correlation with other circum-Pacific tephra records, thus helping confirm the occurrence of widespread coeval eruptions throughout the region.
Year of Publication: 2003
Research Program: ODP Ocean Drilling Program
Key Words: 05 Petrology, Igneous and Metamorphic; 12 Stratigraphy, Historical Geology and Paleoecology; Australasia; Cenozoic; Chatham Rise; Coromandel Peninsula; Correlation; Eruptions; Geochemistry; Igneous rocks; Leg 181; Leg 182; Lithostratigraphy; Magnetostratigraphy; Miocene; Neogene; New Zealand; North Island; ODP Site 1123; ODP Site 1134; Ocean Drilling Program; Pacific Ocean; Pliocene; Pyroclastics; Quaternary; Rhyolites; South Pacific; Taupo volcanic zone; Tertiary; Upper Miocene; Volcanic rocks; Volcanism
Coordinates: S333144 S333144 E1271550 E1271550
S414710 S414710 W1712956 W1712956
Record ID: 2003045526
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States